Machine spindle and packing therefor



July 28, 1942. A, SIMONDS 2,291,356

MACHINE SPINDLE AND PACKING THEREFOR Filed April 14, 1941 Patente'el July 2s, 1942 j' Z9`291356 UNlTED STATES# PATENT. OFFICE MACHINE ,SPINDLE AND PACKING THEREFOR Albert L. Simonds, Southbridge, Mass.

Application April 14, 1941, Serial No. 388,522

1 Claim. (Cl. 308-227) This invention relates to machine spindles and gages the packing 35 when the snap washer 40 to means for excluding dirt or abrasive from the is in position. bearings of such spindles. The invention is par- The cap 3l] has a shallow outer recess 4ta to ticulariy applicable to vertical spindles such as clear the outer edge of the flange 2l and to reare used in lens-grinding machines or in other 5 ceive dirt or abrasive, and also has a shallow regrinding or polishing machines. cess 42 on its under side to clear the upper part In such machines in which line loose abrasive of the upper bearing Il. The ball bearings Il is used, it has been found extremely diiiicult to and I2 are not shown in detail but may be of any prevent entrance of dirt or abrasive to the bearusual commercial form.

The packing ring 35 is formed of a firm felt ings, with consequent rapid wear and short life.

or other similar cushion material and is of such It is the general object of my present invention to provide an improved spindle construcdimensions that it fits snugly in the recess 34 and tion and an improved packing for said spindle, also snugly engages the cylindrical surface of the which parts coact in a very effective manner to enlarged portion 2i) of the spindle. The ring 35 exclude dirt or abrasive from the spindle bearing. is also of such thickness that it closely engages To the accomplishment of this general object, JElle underside 0f the Hnge 2| When the Parts I have provided the improved spindle and packare assembled.

ing construction shown in the drawing and de- A fingel 0r DIOl'feCOI" 50 iS mounted Orl the scribed in detail in the following spooiiioation. Spindle lll above the flange 2l and projects over My invention further relates to arrangements the entire bearing and housing as clearly shown and combinations of parts vvhioh will be heieihin Fie 1- Any Suitable grinding Wheel or form after described and more particularly pointed out may be mounted 0n the edaDtOr 23 or may be attached direct to the threaded portion 22 of the in the appended claim. d1

A referred form of the inve'ition is shown in 5pm *ethe mwng, in which l l 25 With this construction, entry of dirt or abrasive to the bearings ll and l2 is very effectively M v prxl/ lsgsnalencfgg; elelaulon of my lm prevented. Such dirt or abrasive must first pass Fig. 2 is a front elevation of the Spindle. upward and inward under the rapidly rotating Fig 3 is a plan View of the housing cav inger or protector 50, and must then escape the .so recess 4l and work inward against centrifugal Fig 4 1S a' Sectional from e1.eVat10n of the cap force for the entire width of the flange 2| with taken alolg the 1m? 1 5 m Flg' 3; 311.01 which the packing 35 is in close engagement.

Flg.' 5 11.5 a' Sectional from elevation of the If any dirt or abrasive reaches the inner edge packmg img' of the ange 2l and packing 35, it must then Bleferizlng to Fig. 1, I have shown my lmlelOVed travel downward between the packing and the splndle l rotatably mounted 1n ball bearlngs Il enlarged portion 2g of the spindle and through and '2 which are hem in spaced Telajton in a the opening 32 in the housing I4 before it can housmg b5 Snai? mgs E5 Seated m spaced reach the bearings, which in themselves may be grooves m the housmg' additionally sealed or protected.

The spindle lllhas an enlarged pOltlOll 2@ Sllr- 4o My improved spindle, manufactured as above mounted by a wide flange 2l and by a threaded described, is found in practical operation to very P'Ortlon 22 to which al? adaptor 23 of any de effectively exclude dirt and abrasive and to have Slled form may be applleda much longer useful life than with the con- A housing Cal) 3 S flXed t0 the 1113133? end 0f structions commonly used heretofore. the housing ld by screws 3| and is provided with 45 Having thus described my invention and the an inner opening 32 (Fie- 3) Somewhat Closely advantages thereof, 1 do not wish to be limited to Clearing the enlarged Portion 25 0f the Spindle the details herein disclosed, otherwise than as lil. The cap Se is also provided with an annular set forth in the o1alm,but what 1 claim is: recess 3d in which a packing ring 35 is seated. In a grinding machine, a fixed housing, a Ver- The upper Surfaoe of the ring 35 is eloselyen- 50 tioal spindle having an upper annular horizontal geged by the Under Surface Of the flange 2|, as ange of substantial width xed thereto and Clearly shown in Fig. 1. The Spindle iS reerled rotating therewith, an upper thrust bearing for in Vereel IJOSOIl by a Sneep WdSiler 49, inserted said spindle mounted in said housing, a lower in a groove 4l near the lower end of the spindle thrust bearing for said spindle mounted in said and so positioned that the flange 2l rmlv en- 55 housing and positively held from upward moveaxially on said spindle by a predetermined distance such that they coact to hold said packing ring under rm and continuous compression between the under surface of the annular horizontal flange on said spindle and the horizontal bottom surface of the open recess in the top face of the housing cap.

ALBERT L. SIMONDS. 

